SJ Gauge low-pressure gauge for gaseous and liquid process media

SJ Gauge pressure gauge showing zero-point adjustment

Low Pressure Gauge with Stainless Steel Case

Model: PRSM

Suitable for gaseous media compatible with copper alloys; not for use with liquids.
External zero adjustment for easy recalibration.
Stainless steel case — other different materials available: PRM, PRSSM.TU

Responsive after-sales service / Customizable
High quality / One-year warranty
Product images are for reference only. Final specifications are based on the confirmed order.

Description

The PRSM is a low-pressure capsule gauge featuring a stainless-steel case and designed for gaseous media compatible with copper alloy components (excluding liquids). It offers measuring ranges from 0–300 mmAq to 0–5000 mmAq, including vacuum and compound options. With chromium-plated copper wetted parts and zero-point adjustment capability, the gauge is available in 2.5″, 3″, and 4″ dial sizes, using acrylic windows for 2.5″ and glass windows for 3″ and 4″. The PRSM is ideal for HVAC systems, cleanrooms, laboratories, medical gas supply, and general low-pressure monitoring applications, combining the durability of a stainless-steel case with the sensitivity of a capsule gauge.

Specifications

Connection location	Bottom mount, back mount
Nominal size	2.5", 3", 4"
Scale ranges	0 … 300 mmAq to 0 … 5000 mmAq, or other equivalent units of pressure, vacuum or compound
Accuracy	ASME B40.1 grade B ±3/2/3%
Process connection	Chromium-plated copper 1/4, 3/8, 1/2 PT, G, NPT
Case/Ring	304 SS
Window	2.5": acrylic 3", 4": glass
Dial	Aluminum alloy, black scale on white
Pointer	Black aluminum alloy
Movement	Copper alloy
Capsule element	Copper alloy
Medium temperature	-20°C ... 60°C
Pressure limitation	Steady: 0.75 x full scale value Fluctuating: 0.6 x full scale value